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Polypyrrole/graphene composite‐coated fiber for the solid‐phase microextraction of phenols
Author(s) -
Zou Jing,
Song Xinhong,
Ji Jiaojiao,
Xu Weici,
Chen Jinmei,
Jiang Yaqi,
Wang Yiru,
Chen Xi
Publication year - 2011
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201100303
Subject(s) - polypyrrole , solid phase microextraction , extraction (chemistry) , fiber , detection limit , desorption , graphene , materials science , chromatography , phenol , solid phase extraction , chemistry , adsorption , mass spectrometry , polymerization , gas chromatography–mass spectrometry , composite material , organic chemistry , polymer , nanotechnology
A polypyrrole (Ppy)/graphene (G) composite was developed and applied as a novel coating for use in solid‐phase microextraction (SPME) coupled with gas chromatography (GC). The Ppy/G‐coated fiber was prepared by electrochemically polymerizing pyrrole and G on a stainless‐steel wire. The extraction efficiency of Ppy/G‐coated fiber for five phenols was the highest compared with the fibers coated with either Ppy or Ppy/graphene oxide (GO) using the same method preparation. Significantly, compared with various commercial fibers, the extraction efficiency of Ppy/G‐coated fiber is better than or comparable to 85 μm CAR/PDMS fiber (best extraction efficiency of phenol, o ‐cresol, and m ‐cresol in commercial fibers) and 85 μm polyacrylate (PA) fiber (best extraction efficiency of 2,4‐dichlorophenol and p ‐bromophenol in commercial fibers). The effects of extraction and desorption parameters such as extraction time, stirring rate, and desorption temperature and time on the extraction/desorption efficiency were investigated and optimized. The calibration curves were linear from 10 to 1000 μg/L for o ‐cresol, m ‐cresol, p ‐bromophenol, and 2,4‐dichlorophenol, and from 50 to 1000 μg/L for phenol. The detection limits were within the range 0.34–3.4 μg/L. The single fiber and fiber‐to‐fiber reproducibilities were <8.3 ( n =7) and 13.3% ( n =4), respectively. The recovery of the phenols spiked in natural water samples at 200 μg/L ranged from 74.1 to 103.9% and the relative standard deviations were <3.7%.